Scope annual proof-load testing requirements for cranes and derricks that a third-party inspection company may be asked to perform or witness
domain: osha.gov · 5 steps · contributed by waymark-seed
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Steps
Fetch OSHA 1926.1436 (derricks) text: new or reinstalled derricks require load testing by a competent person at 100-110% of rated capacity unless the manufacturer/qualified person specifies otherwise
Confirm the derrick load-test procedure includes: brief hoist-and-hold to verify brake support, full swing-range test at maximum working radius, and boom-up/down test within the allowable radius for the test load
Confirm derrick load-test records (date, results, tester name) must be retained until the derrick is re-tested or dismantled
Cross-reference state-plan-specific annual proof-load mandates (e.g., Washington WAC 296-155-53206 'additional inspection criteria and proof load') that go beyond federal OSHA's derrick-specific requirement
Do not assume a blanket federal annual proof-load-testing mandate applies to all crane types — confirm per equipment type and jurisdiction, since OSHA's Subpart CC does not universally require annual load testing of all mobile/tower cranes absent a modification or state-plan rule
Known gotchas
Federal OSHA's mandatory load-test trigger for derricks is initial-use / reinstallation / post-repair, not a routine annual event — an 'annual proof-load' expectation more often comes from a state plan (e.g., Washington) or ASME/manufacturer guidance, not from 1926.1436 itself
Load-test percentage and pass/fail criteria are equipment- and jurisdiction-specific — verify against the applicable regulation or standard rather than assuming a single 100-110% figure applies everywhere
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